[Olympus] First test run of Olympus at DORIS

[John R Calarco]

Congratulations to all.

-- 
John R Calarco
Dept of Physics
Univ of New Hampshire
Office: 603-862-2088
FAX: 603-862-2998
Email: Calarco at unh.edu

> Dear colleagues,
>
> I am very happy to report that we successfully accomplished our first beam
> time with the Olympus experiment installed in the DORIS ring.
> After the roll-in in July and the final installations of the sub systems
> DORIS was started with 2 GeV positrons last Friday (August 5th). On Monday
> we switched to 4.5 GeV positrons in 5 bunches, which represents the worst
> case concerning wakefield heating.
> It turns out that the new designed target (cell, wakefield suppressors,
> cooling contact, supports etc.) does a very good job and it remains
> cold and stable. The temperature rises just by a few degrees. The maximum
> temperature increase on the cell of 25K was observed on the upstream end.
> Due to this very good performance we decided to leave the target in the
> ring, allowing us to do more tests with the target until the data taking
> starts. Thanks to all the people making this happen!
>
> The second major step was the commissioning of all detector sub systems.
> Detailed results should be presented in the upcoming weekly EVO meetings.
>
> Overall it was a very successful campaign. Starting with the preparations
> and the roll-in, survey and fine tuning, the machine operation, as well as
> the detector commissioning. We would like to thank everyone - technicians,
> engineers, scientists, and students - for this marvelous start of Olympus.
>
> Best regards,
>
> Michael and Alexander
>
>
> --
> Dr. Alexander Winnebeck
> winnebeck at mit.edu
>
> Massachusetts Institute of Technology (MIT)
> 77 Massachusetts Avenue
> Bldg 26 / Rm 441
> 02139 Cambridge, MA, USA
> Tel: +1-617-253-3680
>
> DESY
> Bldg 66 / Rm 002
> Notkestrasse 85
> 22603 Hamburg / Germany
> Tel: +49-40-8998-6402
>
>
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